Higher-Order Spatial Impulse Response Rendering: Investigating the Perceived Effects of Spherical Order, Dedicated Diffuse Rendering, and Frequency Resolution
Higher-Order Spatial Impulse Response Rendering: Investigating the Perceived Effects of Spherical Order, Dedicated Diffuse Rendering, and Frequency Resolution
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高阶空间脉冲响应渲染：研究球阶、专用漫反射渲染和频率分辨率的感知效果
DOI：
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发表时间：
2020
影响因子：
1.4
通讯作者：
Marton Marschall
中科院分区：
文献类型：
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作者：
L. McCormack;V. Pulkki;A. Politis;Oliver Scheuregger;Marton Marschall
本文详细介绍了不同的渲染策略的感知效果时，合成扬声器阵列的房间脉冲响应（RIR），使用麦克风阵列RIR在参数化的方式进行调查。该渲染任务的目的是通过扬声器阵列忠实地再现在输入麦克风阵列RIR（或从其导出的球谐RIR）内编码的捕获空间的空间特性。在这项研究中，一个高阶制定的空间脉冲响应渲染（SIRR）方法的介绍，随后采用以下渲染配置的感知效果进行调查：球谐输入顺序，频率分辨率，并利用专用的扩散流渲染。在消声室中使用64通道扬声器阵列进行了正式的听力测试，其中模拟参考场景与不同方法和渲染配置的输出进行了比较。测试结果表明，专用的扩散流渲染和更高的分析顺序都产生显着的感知改善，特别是当采用有问题的瞬态刺激作为输入。此外，据发现，在渲染过程中采用的频率分辨率只有一个较小的影响相比，其他两个测试属性的再现的感知精度。
This article details an investigation into the perceptual effects of different rendering strategies when synthesizing loudspeaker array room impulse responses (RIRs) using microphone array RIRs in a parametric fashion. The aim of this rendering task is to faithfully reproduce the spatial characteristics of a captured space, encoded within the input microphone array RIR (or the spherical harmonic RIR derived from it), over a loudspeaker array. For this study, a higher-order formulation of the Spatial Impulse Response Rendering (SIRR) method is introduced and subsequently employed to investigate the perceptual effects of the following rendering configurations: the spherical harmonic input order, frequency resolution, and utilizing dedicated diffuse stream rendering. Formal listening tests were conducted using a 64-channel loudspeaker array in an anechoic chamber, where simulated reference scenarios were compared against the outputs of different methods and rendering configurations. The test results indicate that dedicated diffuse stream rendering and higher analysis orders both yield noticeable perceptual improvements, particularly when employing problematic transient stimuli as input. Additionally, it was found that the frequency resolution employed during rendering has only a minor influence over the perceived accuracy of the reproduction in comparison to the other two tested attributes.